How much difference in insulation is there between the two(if any)? I have a neoprene breath deflecter(+ balaclava) and goggles I will be wearing. Is there a big significance in the face airflow of the two? I am looking at buying a FOX ProPilot ATV helmet & wondering if it would be adequate? Right now I also have a full face for the really cold days, but if it warms up a bit I like the vision of goggles.